Zobrazeno 1 - 10
of 781
pro vyhledávání: '"Fumiyuki Adachi"'
Publikováno v:
Tongxin xuebao, Vol 41, Pp 1-11 (2020)
Ultra-densification of radio access network (RAN) is a key to efficiently support the exponentially growing mobile data traffic in 5G era.Furthermore,extremely high frequency band like mmWave band was utilized to solve the bandwidth shortage problem.
Externí odkaz:
https://doaj.org/article/04e05184895c42a288ec1c99e54cbc64
Publikováno v:
IEEE Access, Vol 7, Pp 85213-85225 (2019)
In recent years, user cooperative traffic forwarding is a popular study topic and broadly seen as one of the important promising technologies to improve energy efficiency (EE) of the battery-driven mobile terminal (MT). However, the battery-driven de
Externí odkaz:
https://doaj.org/article/ba33448f447a49d1b2a262de3533f4d0
Autor:
Karthik Vasudeva, Sener Dikmese, Ismail Guven, Abolfazl Mehbodniya, Walid Saad, Fumiyuki Adachi
Publikováno v:
IEEE Access, Vol 5, Pp 7542-7552 (2017)
The dense deployment of heterogeneous networks (HetNets) has shown to be a promising direction to cope with the capacity demands in the future 5G wireless networks. The large number of small cell base stations (SBSs) in HetNets intended to help in ac
Externí odkaz:
https://doaj.org/article/a2833af67fa6458b85603f56b0577ac3
Publikováno v:
IEEE Access, Vol 5, Pp 26267-26278 (2017)
The deployment of heterogeneous networks (HetNets) can significantly boost the network capacity. However, the large number of small cell base stations (SBSs) deployed in HetNets can result in an increased total energy consumption. One of the promisin
Externí odkaz:
https://doaj.org/article/dd37fe7d75b8478783a2e05ec5f09533
Autor:
Yunyi Li, Jie Zhang, Shangang Fan, Jie Yang, Jian Xiong, Xiefeng Cheng, Hikmet Sari, Fumiyuki Adachi, Guan Gui
Publikováno v:
Sensors, Vol 17, Iss 12, p 2920 (2017)
Both L 1 / 2 and L 2 / 3 are two typical non-convex regularizations of L p ( 0 < p < 1 ), which can be employed to obtain a sparser solution than the L 1 regularization. Recently, the multiple-state sparse transformation strategy ha
Externí odkaz:
https://doaj.org/article/0dbb15d80dcf4dccaafbd2180d582f65
Publikováno v:
The Scientific World Journal, Vol 2014 (2014)
Channel estimation problem is one of the key technical issues in sparse frequency-selective fading multiple-input multiple-output (MIMO) communication systems using orthogonal frequency division multiplexing (OFDM) scheme. To estimate sparse MIMO cha
Externí odkaz:
https://doaj.org/article/74307fd314d0400aa808d6826dd73673
Publikováno v:
The Scientific World Journal, Vol 2014 (2014)
In orthogonal frequency division modulation (OFDM) communication systems, channel state information (CSI) is required at receiver due to the fact that frequency-selective fading channel leads to disgusting intersymbol interference (ISI) over data tra
Externí odkaz:
https://doaj.org/article/7bde9a39b38d4d7bbc7fa7670fa45844
Publikováno v:
Advances in Fuzzy Systems, Vol 2013 (2013)
A heterogeneous wireless network is characterized by the presence of different wireless access technologies that coexist in an overlay fashion. These wireless access technologies usually differ in terms of their operating parameters. On the other han
Externí odkaz:
https://doaj.org/article/67053736a87c4745a3abbda5c9103f15
Impact of Antenna Placement on Frequency Domain Adaptive Antenna Array in Hybrid FRF Cellular System
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
Frequency domain adaptive antenna array (FDAAA) is an effective method to suppress interference caused by frequency selective fading and multiple-access interference (MAI) in single-carrier (SC) transmission. However, the performance of FDAAA receive
Externí odkaz:
https://doaj.org/article/d24e5b7a69b64a4a8cb24f4df59d0ab5
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2011 (2011)
Externí odkaz:
https://doaj.org/article/0b53770826b64f31850aec4dd44ef23e